Ashley Olsen
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Scarlett Johansson and Justin Bartha: Are They Dating?
The actors, both of whom recently became single, have been spending time together
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Mary-Kate & Ashley Olsen: Their Full House of Style
How the Former Child Stars Reinvented Themselves as Fashion's Hottest Duo
Justin Timberlake 'Not Romantically Involved With Anyone,' Rep Says
But an Olsen source tells PEOPLE the pair are "definitely hooking up"
